From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 283EEC433FE for ; Fri, 15 Oct 2021 09:10:25 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id AD25C61151 for ; Fri, 15 Oct 2021 09:10:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org AD25C61151 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 60D514B14D; Fri, 15 Oct 2021 05:10:24 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1uoH+Qs7fLBV; Fri, 15 Oct 2021 05:10:23 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id A8BA14B195; Fri, 15 Oct 2021 05:10:21 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 2443C4B135 for ; Fri, 15 Oct 2021 05:10:18 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KYXxBOxSU7Y0 for ; Fri, 15 Oct 2021 05:10:16 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 3209E4B137 for ; Fri, 15 Oct 2021 05:10:16 -0400 (EDT) Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D2FD861208; Fri, 15 Oct 2021 09:10:14 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mbJED-00GvHX-4o; Fri, 15 Oct 2021 10:10:13 +0100 From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/5] KVM: arm64: Merge kvm_arch_vcpu_run_pid_change() and kvm_vcpu_first_run_init() Date: Fri, 15 Oct 2021 10:08:20 +0100 Message-Id: <20211015090822.2994920-4-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211015090822.2994920-1-maz@kernel.org> References: <20211015090822.2994920-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, qperret@google.com, will@kernel.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Will Deacon , kernel-team@android.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu The kvm_arch_vcpu_run_pid_change() helper gets called on each PID change. The kvm_vcpu_first_run_init() helper gets run on the... first run(!) of a vcpu. As it turns out, the first run of a vcpu also triggers a PID change event (vcpu->pid is initially NULL). Use this property to merge these two helpers and get rid of another arm64-specific oddity. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/arm.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index ccb59ac54976..30692497c4ea 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -583,22 +583,26 @@ static void update_vmid(struct kvm_vmid *vmid) spin_unlock(&kvm_vmid_lock); } +/* + * Handle both the initialisation that is being done when the vcpu is + * run for the first time, as well as the updates that must be + * performed each time we get a new thread dealing with this vcpu. + */ int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) -{ - return kvm_arch_vcpu_run_map_fp(vcpu); -} - -static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; - int ret = 0; - - if (likely(vcpu->arch.has_run_once)) - return 0; + int ret; if (!kvm_arm_vcpu_is_finalized(vcpu)) return -EPERM; + ret = kvm_arch_vcpu_run_map_fp(vcpu); + if (ret) + return ret; + + if (likely(vcpu->arch.has_run_once)) + return 0; + vcpu->arch.has_run_once = true; kvm_arm_vcpu_init_debug(vcpu); @@ -778,10 +782,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) if (unlikely(!kvm_vcpu_initialized(vcpu))) return -ENOEXEC; - ret = kvm_vcpu_first_run_init(vcpu); - if (ret) - return ret; - if (run->exit_reason == KVM_EXIT_MMIO) { ret = kvm_handle_mmio_return(vcpu); if (ret) -- 2.30.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm